package org.juggers.domain;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.Serializable;

import com.google.gwt.user.client.rpc.IsSerializable;

/**
 * @author <a href="mailto:michel@breizhjug.org">Michel DAVID</a>
 */
public abstract class AbstractEntity
    implements IsSerializable, Serializable
{

    private static final long serialVersionUID = 5095341129800179692L;
    
    private transient PropertyChangeSupport changes = new PropertyChangeSupport( this );

    public PropertyChangeListener[] allPropertyChangeListeners()
    {
        return changes.getPropertyChangeListeners();
    }

    public void addPropertyChangeListener( PropertyChangeListener l )
    {
        changes.addPropertyChangeListener( l );
    }

    public void addPropertyChangeListener( String propertyName, PropertyChangeListener l )
    {
        changes.addPropertyChangeListener( propertyName, l );
    }

    public void removePropertyChangeListener( PropertyChangeListener l )
    {
        changes.removePropertyChangeListener( l );
    }

    public void removePropertyChangeListener( String propertyName, PropertyChangeListener l )
    {
        changes.removePropertyChangeListener( propertyName, l );
    }

    public void clearPropertyChangeListeners()
    {
        PropertyChangeListener[] listeners = changes.getPropertyChangeListeners();
        for ( int i = 0; listeners != null && i < listeners.length; i++ )
        {
            this.removePropertyChangeListener( listeners[i] );
        }
    }

    protected void firePropertyChange( String property, Object oldValue, Object newValue )
    {
        changes.firePropertyChange( property, oldValue, newValue );
    }
}
